diff -r 000000000000 -r 6474c204b198 storage/src/VacuumManager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/storage/src/VacuumManager.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_storage_VacuumManager_h__
+#define mozilla_storage_VacuumManager_h__
+
+#include "nsCOMPtr.h"
+#include "nsIObserver.h"
+#include "mozIStorageStatementCallback.h"
+#include "mozIStorageVacuumParticipant.h"
+#include "nsCategoryCache.h"
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+namespace storage {
+
+class VacuumManager MOZ_FINAL : public nsIObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  VacuumManager();
+
+  /**
+   * Obtains the VacuumManager object.
+   */
+  static VacuumManager * getSingleton();
+
+private:
+  ~VacuumManager();
+
+  static VacuumManager *gVacuumManager;
+
+  // Cache of components registered in "vacuum-participant" category.
+  nsCategoryCache<mozIStorageVacuumParticipant> mParticipants;
+};
+
+} // namespace storage
+} // namespace mozilla
+
+#endif